21745521

素因数分解:

$3^2\times 7^1\times {\mathrm{181}}^1\times {\mathrm{1907}}^1$

素因数の和:2101

約数の個数: 24

約数和(自身を含む): 36114624

約数和(自身を除く): 14369103

約数列:

[1, 3, 7, 9, 21, 63, 181, 543, 1267, 1629, 1907, 3801, 5721, 11403, 13349, 17163, 40047, 120141, 345167, 1035501, 2416169, 3106503, 7248507, 21745521]

約数ペア:

[(1, 21745521), (3, 7248507), (7, 3106503), (9, 2416169), (21, 1035501), (63, 345167), (181, 120141), (543, 40047), (1267, 17163), (1629, 13349), (1907, 11403), (3801, 5721)]